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CALTECH Environmental Laboratories <br /> QA/QC Report <br /> Method: 8260B <br /> Matrix: Water <br /> Date Analyzed: 2/27/07 <br /> Date Extracted: 2/27/07 <br /> Perimeters Conc. u /L Spike Recovery % Control Limits RPD <br /> LCS LCSD Added LCS LCSD Rec. RPD <br /> 1,1-Dichloroethene 52 55 50 104 110 70-130 20 6 <br /> Benzene 53 54 50 106 108 70-130 20 2 <br /> Trichloroethene 46 49 50 92 98 7o-130 20 6 <br /> Toluene 51 52 50 102 104 70-130 20 2 <br /> Chlorobenzene 44 45 50 88 90 70-130 20 2 <br /> m,p-X lenes 88 93 1001 88 93 70-130 20 5 <br /> LCS: Laboratory Control Standard <br /> LCSD: Laboratory Control Standard Duplicate <br /> RPD: Relative Percent Difference of LCS and LCSD <br /> Perimeters Method Units Det. <br /> Blank Limit <br /> 1,1-Dichloroethene ND u /L 1 <br /> Benzene ND u /L 0.5 <br /> Trichloroethene ND ug/L 0.5 <br /> Toluene ND ug/L 0.5 <br /> Chlorobenzene ND ug/L 0.5 <br /> m, -X lenes ND u /L 0.6 <br /> MEDB <br /> ND u /L 1 <br /> ND u /L 10 <br /> ND ug/L 1 <br /> ND u /L 1 <br /> ND u /L 1 <br /> ND ug/L 0.5 <br /> ND u /L 0.5 <br /> ND u /L 0.5 <br /> o-Xylene ND u /L 0.6 <br /> ICE ND ug/L 1 <br /> PCE ND u /L 1 <br /> lO111 ( 1 I)l l )I( ' ilIl) 1( ) ( i 1; I )Nil 1; C' 11SFA� 'Tln\I <br />